R1973ABLKREDEF1 Equivalent & Substitute Parts

Part Overview

The R1973ABLKREDEF1 is an illuminated rocker switch manufactured by E-Switch, designed for panel-mount applications requiring SPST (Single Pole Single Throw) on-off control. This component operates at 125V AC with a 9A current rating and features a red neon illumination with concave actuator design. The product is currently active in production with 670 units in stock.

Substitute parts become necessary when the primary component experiences supply constraints, extended lead times, or when design requirements permit operation within broader electrical or mechanical specifications.

Substiute Parts

R1973ABLKREDEF1

E-SwitchIn Stock: 682R1973ABLKREDEF1 Datasheet

Current PartRFQ

LRA22H2FBRLN

ZF ElectronicsIn Stock: 4913LRA22H2FBRLN Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the R1973ABLKREDEF1 is determined by the following critical parameters:

• Circuit configuration must remain SPST with on-off switching function
• Voltage rating must be 125V AC minimum
• Current rating must be 9A AC or greater
• Mounting type must be panel mount with snap-in capability
• Actuator must be illuminated with red neon indication at 125 VAC
• Termination must be quick connect 0.187" (4.7mm) style
• Panel cutout dimensions must accommodate the rectangular opening within acceptable mechanical tolerances
• Operating temperature range must encompass or exceed -30°C to 65°C

The LRA22H2FBRLN from ZF Electronics meets these substitution criteria with equivalent or superior electrical and mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

Both the R1973ABLKREDEF1 and LRA22H2FBRLN are active production components with ROHS3 compliance. The LRA22H2FBRLN offers enhanced mechanical durability with 100,000 cycles compared to 30,000 cycles for the primary part, and carries additional regulatory approvals including CE, cULus, and VDE certifications. The current rating of 10A on the substitute part exceeds the 9A requirement of the original design.

Panel cutout dimensions are nominally equivalent (19.20mm x 12.80mm versus 19.10mm x 12.90mm), representing a 0.1mm variance in each axis within standard mechanical tolerances for panel-mount snap-in applications. The operating temperature range of the substitute part (-20°C to 65°C) covers the upper portion of the primary part's range (-30°C to 65°C), making it suitable for applications not requiring extended low-temperature operation below -20°C.

Frequently Asked Questions (FAQ)

Q: Can the LRA22H2FBRLN directly replace the R1973ABLKREDEF1 in existing designs?

A: Yes, provided the application does not require operation below -20°C. The substitute part meets or exceeds all critical electrical parameters (voltage, current, circuit configuration) and maintains mechanical compatibility through equivalent termination style and nominally equivalent panel cutout dimensions.

Q: What is the significance of the 0.1mm difference in panel cutout dimensions?

A: The dimensional variance (19.20mm x 12.80mm versus 19.10mm x 12.90mm) falls within standard mechanical tolerances for panel-mount snap-in switches. Both parts are designed for rectangular panel openings and will function identically in standard installation procedures.

Q: Why does the substitute part have lower electrical life (6,000 cycles) despite higher mechanical life (100,000 cycles)?

A: Electrical life and mechanical life represent different failure modes. Electrical life reflects contact degradation under load, while mechanical life reflects actuator and spring durability. The LRA22H2FBRLN demonstrates superior mechanical robustness while maintaining adequate electrical life for the specified 125V 10A application.

Q: Are there compliance differences between the two parts?

A: The LRA22H2FBRLN carries CE, cULus, and VDE certifications in addition to ROHS3 compliance. Both parts are REACH unaffected and classified under ECCN EAR99. The additional certifications on the substitute part provide broader regulatory acceptance in international markets.

Q: What is the inventory status for each part?

A: The R1973ABLKREDEF1 has 670 units in stock. The LRA22H2FBRLN has 4,846 units in stock, providing significantly greater availability for immediate procurement.